14. DATA REPORT: ENVIRONMENTAL ROCK-MAGNETIC EVIDENCE OF AUTHIGENIC-MAGNETIC MINERAL FORMATION/PRESERVATION (AMAZON FAN)¹

Frank R. Hall,² Stanley Cisowski,³ and Suku John⁴

ABSTRACT

Environmental rock-magnetic analyses were performed on sediments from all 17 sites drilled during Ocean Drilling Program Leg 155, Amazon Fan (Sites 930-946). In addition to the particles delivered to these sites via mass-wasting processes, rock-magnetic signals indicate the presence of authigenic magnetic-mineral phases. In particular, these phases include bacterial magnetite (Fe₃O₄) and greigite (Fe₃S₄).

Flood, R.D., Piper, D.J.W., Klaus, A. and Peterson, L.C. (Eds.), 1997. Proc. ODP, Sci. Results, 155: College Station, TX (Ocean Drilling Program).
²Graduate College of Marine Studies, University of Delaware, Newark, DE 19716, U.S.A. frhall@udel.edu
³Department of Geological Sciences, University of California Santa Barbara, Santa Barbara, CA 93105, U.S.A.
⁴Department of Geological Sciences, University of Delaware, Newark, DE 19716, U.S.A.